Railway vehicle

Abstract

A slide structure 21 of a railway vehicle includes a slide end beam 22 disposed in front of an end beam 16 that constitutes a portion of a body, and a slide center beam 23 projecting rearward of the slide end beam. An underframe 12 is provided with a guide portion 24 that guides the slide center beam in the longitudinal direction of the body. The underframe 12 is also provided with a holding member 28 that holds the slide center beam at a front position of the body with respect to the guide portion. The holding member has such a tensile strength that the holding member couples the underframe and the slide structure to each other in the longitudinal direction of the body and the holding member is broken when a tensile load in a rearward direction of the body applied from the slide structure to the holding member exceeds a preset tensile load, thereby permitting the slide structure to move in the rearward direction of the body. An impact absorbing member 29 is disposed between the underframe and the slide structure.

1. A railway vehicle in which a slide structure that slides in a rearward direction of a body of the railway vehicle at a time of collision is disposed at a front portion of the body, wherein
 the slide structure includes a slide end beam disposed at the front position of the body, and a slide center beam projecting rearward of the slide end beam, 
 the body of the railway vehicle includes a guide portion that guides the slide center beam in a longitudinal direction of the body, and a holding member connected to the body such that the holding member holds the slide structure at the front position of the body by abutting a rearward end of the slide structure whereby the rearward end of the slide structure does not extend beyond the holding member at a most rearward point of the holding member, and 
 the holding member has a unitary structure and is connected to the body of the railway vehicle in such an orientation that a load applied to the holding member by the slide structure is a tensile load and the holding member has such a tensile strength that the holding member couples the body and the slide structure to each other in the longitudinal direction of the body and the holding member is pulled apart in a direction longitudinal to the body of the railway vehicle and is broken when the tensile load in the rearward direction of the body applied from the slide structure to the holding member exceeds a preset tensile load, thereby permitting the slide structure to move in the rearward direction of the body. 
 
     
     
       2. The railway vehicle according to  claim 1 , wherein an impact absorbing member is provided between the body and the slide structure, wherein the impact absorbing member is deformed when the slide structure moves in the rearward direction of the body, thereby absorbing moving energy of the slide structure in the rearward direction of the body. 
     
     
       3. The railway vehicle according to  claim 2 , wherein the holding member comprises a plurality of connecting plates, and an intermediate portion of each of the connecting plates is provided with a breakage portion having a cross-sectional area smaller than those of both ends of the connecting plate. 
     
     
       4. The railway vehicle according to  claim 3 , wherein the slide center beam includes slide portions respectively projecting in both widthwise directions of the body, inclined slide surfaces whose upper portions are spread are provided on lower surfaces of the slide portions, and the guide portion includes an inclined guide surface, which receives and slidably engages with an inclined slide surface, the inclined guide surface supporting the inclined slide surface from below such that the inclined slide surface can move in the longitudinal direction of the body. 
     
     
       5. The railway vehicle according to  claim 1 , wherein the holding member comprises a plurality of connecting plates, and an intermediate portion of each of the connecting plates is provided with a breakage portion having a cross-sectional area smaller than cross-sectional areas of both ends of the connecting plate. 
     
     
       6. The railway vehicle according to  claim 2 , wherein the slide center beam includes slide portions respectively projecting in both widthwise directions of the body, inclined slide surfaces whose upper portions are spread are provided on lower surfaces of the slide portions, and the guide portion includes an inclined guide surface, which receives and slidably engages with an inclined slide surface, the inclined guide surface supporting the inclined slide surface from below such that the inclined slide surface can move in the longitudinal direction of the body. 
     
     
       7. The railway vehicle according to  claim 1 , wherein the slide center beam includes slide portions respectively projecting in both widthwise directions of the body, inclined slide surfaces whose upper portions are spread are provided on lower surfaces of the slide portions, and the guide portion includes an inclined guide surface, which receives and slidably engages with an inclined slide surface, the inclined guide surface supporting the inclined slide surface from below such that the inclined slide surface can move in the longitudinal direction of the body. 
     
     
       8. The railway vehicle according to  claim 5 , wherein the slide center beam includes slide portions respectively projecting in both widthwise directions of the body, inclined slide surfaces whose upper portions are spread are provided on lower surfaces of the slide portions, and the guide portion includes an inclined guide surface, which receives and slidably engages with an inclined slide surface, the inclined guide surface supporting the inclined slide surface from below such that the inclined slide surface can move in the longitudinal direction of the body. 
     
     
       9. A railway vehicle including a slide structure that slides in a rearward direction of a railway vehicle body at a time of collision, wherein,
 the slide structure is disposed at a front portion of the body and includes a slide end beam disposed at the front of the railway vehicle body, and a slide center beam projects rearward of the slide end beam and includes a plurality of inclined slide surfaces; 
 the railway vehicle body includes a guide portion that guides the slide center beam in a longitudinal direction of the vehicle body, the guide portion including a plurality of inclined guide surfaces that receive and slidably engage the plurality of inclined slide surfaces; 
 a holding member connected to the body such that the holding member holds the slide structure at the front position of the body by abutting a rearward end of the slide structure whereby the rearward end of the slide structure does not extend beyond the holding member at a most rearward point of the holding member, and 
 the holding member has a unitary structure and is connected to the body of the railway vehicle in such an orientation that a load applied to the holding member by the slide structure is a tensile load and the holding member includes a plurality of connecting plates, each having a preset tensile strength and each being coupled to the vehicle body and the slide structure in a longitudinal direction of the vehicle body, wherein 
 when a force exceeding the preset tensile strength of the holding members is applied in a rearward direction upon the slide structure, the holding member is pulled apart in a direction longitudinal to the body of the railway vehicle and breaks to permit the slide structure to move in the rearward direction of the vehicle body. 
 
     
     
       10. A railway vehicle in which a slide structure that slides in a rearward direction of a body of the railway vehicle at the time of a collision is disposed at a front portion in the body, wherein
 the slide structure includes a slide end beam disposed at the front position of the body, and a slide center beam projecting rearward of the slide end beam, 
 the body of the railway vehicle includes a guide portion which is provided on facing surfaces of a pair of center beams that are provided in the direction of rails between an end beam and a bolster beam and which guides the slide center beam in a longitudinal direction of the body, and a holding member which is provided at a rear end of the slide center beam and which couples the body and the slide structure to each other in the longitudinal direction of the body to hold the slide structure at the front position of the body by abutting a rearward end of the slide structure whereby the rearward end of the slide structure does not extend beyond the holding member at a most rearward point of the holding member, and 
 the holding member comprises a plurality of connecting plates each having a unitary structure and each being connected to the body of the railway vehicle in such an orientation that a load applied to each connecting plate by the slide structure is a tensile load, 
 each connecting plate which has a U-shape as viewed from above includes a fixing plate fixed to the holding member, and connecting portions extending from both sides of the fixing plate in a direction of sleepers toward front of the body, 
 an intermediate portion of each of the connecting plates is provided with a breakage portion having a cross-sectional area smaller than those of the fixing plate of the connecting portion and the tip end fixed to the guide portions, and 
 the breakage portion is set such that it is possible to obtain such a tensile strength that all of the breakage portions are pulled apart in a direction longitudinal to the body of the railway vehicle and are broken substantially at the same time.